package service

import (
	"context"
	"fmt"
	"time"

	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/os/gtime"

	"goldtree/internal/dao"
	"goldtree/internal/entity"
)

// DataQueryService 数据查询服务
type DataQueryService struct{}

var DataQuery = DataQueryService{}

// StockQueryReq 股票查询请求
type StockQueryReq struct {
	Page     int      `json:"page" v:"min:1#页码必须大于0"`
	Limit    int      `json:"limit" v:"min:1|max:100#每页数量必须大于0|每页数量不能超过100"`
	Keyword  string   `json:"keyword"`
	Codes    []string `json:"codes"`
	Market   string   `json:"market"`
	Industry string   `json:"industry"`
	Sector   string   `json:"sector"`
	MinCap   float64  `json:"min_cap"`
	MaxCap   float64  `json:"max_cap"`
	IsActive *bool    `json:"is_active"`
	SortBy   string   `json:"sort_by" v:"in:code,name,market_cap,created_at#排序字段无效"`
	SortDesc bool     `json:"sort_desc"`
}

// StockQueryRes 股票查询响应
type StockQueryRes struct {
	List  []*entity.Stock `json:"list"`
	Total int             `json:"total"`
	Page  int             `json:"page"`
	Limit int             `json:"limit"`
}

// KLineQueryReq K线数据查询请求
type KLineQueryReq struct {
	StockCode string `json:"stock_code" v:"required|length:6,10#股票代码不能为空|股票代码长度为6-10位"`
	Period    string `json:"period" v:"required|in:1m,5m,15m,30m,1h,1d,1w,1M#时间周期不能为空|时间周期格式错误"`
	StartDate string `json:"start_date" v:"date#开始日期格式错误"`
	EndDate   string `json:"end_date" v:"date#结束日期格式错误"`
	Limit     int    `json:"limit" v:"min:1|max:1000#数量必须大于0|数量不能超过1000"`
}

// KLineData K线数据
type KLineData struct {
	StockCode   string      `json:"stock_code"`
	Period      string      `json:"period"`
	Timestamp   *gtime.Time `json:"timestamp"`
	OpenPrice   float64     `json:"open_price"`
	HighPrice   float64     `json:"high_price"`
	LowPrice    float64     `json:"low_price"`
	ClosePrice  float64     `json:"close_price"`
	Volume      int64       `json:"volume"`
	Amount      float64     `json:"amount"`
	Change      float64     `json:"change"`
	ChangeRatio float64     `json:"change_ratio"`
}

// MarketDataQueryReq 市场数据查询请求
type MarketDataQueryReq struct {
	Market    string   `json:"market"`
	Industry  string   `json:"industry"`
	StockCode string   `json:"stock_code"`
	Codes     []string `json:"codes"`
	Limit     int      `json:"limit" v:"min:1|max:500#数量必须大于0|数量不能超过500"`
}

// MarketData 市场数据
type MarketData struct {
	StockCode   string      `json:"stock_code"`
	StockName   string      `json:"stock_name"`
	Price       float64     `json:"price"`
	Volume      int64       `json:"volume"`
	Amount      float64     `json:"amount"`
	Change      float64     `json:"change"`
	ChangeRatio float64     `json:"change_ratio"`
	OpenPrice   float64     `json:"open_price"`
	HighPrice   float64     `json:"high_price"`
	LowPrice    float64     `json:"low_price"`
	PreClose    float64     `json:"pre_close"`
	Timestamp   *gtime.Time `json:"timestamp"`
}

// SignalQueryReq 信号查询请求
type SignalQueryReq struct {
	Page       int      `json:"page" v:"min:1#页码必须大于0"`
	Limit      int      `json:"limit" v:"min:1|max:100#每页数量必须大于0|每页数量不能超过100"`
	StrategyId int      `json:"strategy_id"`
	StockCode  string   `json:"stock_code"`
	SignalType string   `json:"signal_type" v:"in:buy,sell,hold#信号类型错误"`
	Status     string   `json:"status" v:"in:pending,executed,cancelled#状态错误"`
	StartDate  string   `json:"start_date" v:"date#开始日期格式错误"`
	EndDate    string   `json:"end_date" v:"date#结束日期格式错误"`
}

// SignalQueryRes 信号查询响应
type SignalQueryRes struct {
	List  []*entity.TradingSignal `json:"list"`
	Total int                     `json:"total"`
	Page  int                     `json:"page"`
	Limit int                     `json:"limit"`
}

// StatisticsReq 统计数据请求
type StatisticsReq struct {
	Type      string `json:"type" v:"required|in:overview,pool,tag,strategy,signal#统计类型不能为空|统计类型错误"`
	StartDate string `json:"start_date" v:"date#开始日期格式错误"`
	EndDate   string `json:"end_date" v:"date#结束日期格式错误"`
}

// OverviewStats 系统概览统计
type OverviewStats struct {
	StockCount      int     `json:"stock_count"`
	PoolCount       int     `json:"pool_count"`
	TagCount        int     `json:"tag_count"`
	StrategyCount   int     `json:"strategy_count"`
	ActiveStrategies int    `json:"active_strategies"`
	RunningStrategies int   `json:"running_strategies"`
	TotalSignals    int     `json:"total_signals"`
	PendingSignals  int     `json:"pending_signals"`
	TodaySignals    int     `json:"today_signals"`
	SystemUptime    string  `json:"system_uptime"`
}

// QueryStocks 查询股票数据
func (s *DataQueryService) QueryStocks(ctx context.Context, req *StockQueryReq) (*StockQueryRes, error) {
	// 设置默认值
	if req.Page == 0 {
		req.Page = 1
	}
	if req.Limit == 0 {
		req.Limit = 20
	}
	if req.SortBy == "" {
		req.SortBy = "created_at"
	}

	// 构建查询条件
	var conditions []interface{}
	whereClause := ""

	// 关键字搜索
	if req.Keyword != "" {
		whereClause = "code LIKE ? OR name LIKE ?"
		conditions = append(conditions, "%"+req.Keyword+"%", "%"+req.Keyword+"%")
	}

	// 股票代码列表
	if len(req.Codes) > 0 {
		placeholders := ""
		for i, code := range req.Codes {
			if i > 0 {
				placeholders += ","
			}
			placeholders += "?"
			conditions = append(conditions, code)
		}
		codeCondition := fmt.Sprintf("code IN (%s)", placeholders)
		if whereClause != "" {
			whereClause = fmt.Sprintf("(%s) AND %s", whereClause, codeCondition)
		} else {
			whereClause = codeCondition
		}
	}

	// 市场筛选
	if req.Market != "" {
		condition := "market = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.Market)
	}

	// 行业筛选
	if req.Industry != "" {
		condition := "industry = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.Industry)
	}

	// 板块筛选
	if req.Sector != "" {
		condition := "sector = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.Sector)
	}

	// 市值范围筛选
	if req.MinCap > 0 {
		condition := "market_cap >= ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.MinCap)
	}
	if req.MaxCap > 0 {
		condition := "market_cap <= ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.MaxCap)
	}

	// 是否有效筛选
	if req.IsActive != nil {
		condition := "is_active = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, *req.IsActive)
	}

	// 添加条件到查询参数
	queryConditions := []interface{}{}
	if whereClause != "" {
		queryConditions = append(queryConditions, whereClause)
		queryConditions = append(queryConditions, conditions...)
	}

	// 获取股票列表
	stocks, err := dao.Stock.GetList(ctx, req.Page, req.Limit, queryConditions...)
	if err != nil {
		return nil, gerror.Wrap(err, "查询股票数据失败")
	}

	// 获取总数
	total, err := dao.Stock.GetCount(ctx, queryConditions...)
	if err != nil {
		return nil, gerror.Wrap(err, "获取股票总数失败")
	}

	return &StockQueryRes{
		List:  stocks,
		Total: total,
		Page:  req.Page,
		Limit: req.Limit,
	}, nil
}

// QueryKLineData 查询K线数据
func (s *DataQueryService) QueryKLineData(ctx context.Context, req *KLineQueryReq) ([]*KLineData, error) {
	// 设置默认值
	if req.Limit == 0 {
		req.Limit = 100
	}

	// TODO: 这里需要实现K线数据存储和查询
	// 目前返回模拟数据作为示例
	g.Log().Info(ctx, "查询K线数据", "stock_code", req.StockCode, "period", req.Period)

	// 模拟K线数据
	var klines []*KLineData
	now := gtime.Now()
	for i := 0; i < req.Limit && i < 30; i++ {
		kline := &KLineData{
			StockCode:   req.StockCode,
			Period:      req.Period,
			Timestamp:   gtime.New(now.Add(-time.Duration(i) * time.Hour * 24)),
			OpenPrice:   10.0 + float64(i)*0.1,
			HighPrice:   10.5 + float64(i)*0.1,
			LowPrice:    9.5 + float64(i)*0.1,
			ClosePrice:  10.2 + float64(i)*0.1,
			Volume:      int64(1000000 + i*10000),
			Amount:      float64(10000000 + i*100000),
			Change:      0.1,
			ChangeRatio: 1.0,
		}
		klines = append(klines, kline)
	}

	return klines, nil
}

// QueryMarketData 查询市场数据
func (s *DataQueryService) QueryMarketData(ctx context.Context, req *MarketDataQueryReq) ([]*MarketData, error) {
	// 设置默认值
	if req.Limit == 0 {
		req.Limit = 50
	}

	// TODO: 这里需要实现实时市场数据获取
	// 目前返回模拟数据作为示例
	g.Log().Info(ctx, "查询市场数据", "market", req.Market, "stock_code", req.StockCode)

	// 获取股票基本信息
	var stocks []*entity.Stock
	var err error

	if req.StockCode != "" {
		// 查询单只股票
		stock, err := dao.Stock.GetByCode(ctx, req.StockCode)
		if err != nil {
			return nil, gerror.Wrap(err, "获取股票信息失败")
		}
		if stock != nil {
			stocks = append(stocks, stock)
		}
	} else if len(req.Codes) > 0 {
		// 查询指定股票列表
		for _, code := range req.Codes {
			stock, err := dao.Stock.GetByCode(ctx, code)
			if err != nil {
				g.Log().Warning(ctx, "获取股票信息失败", "code", code, "error", err)
				continue
			}
			if stock != nil {
				stocks = append(stocks, stock)
			}
		}
	} else {
		// 查询市场或行业股票
		conditions := []interface{}{}
		if req.Market != "" {
			conditions = append(conditions, "market = ?", req.Market)
		}
		if req.Industry != "" {
			if len(conditions) > 0 {
				conditions[0] = fmt.Sprintf("%s AND industry = ?", conditions[0])
				conditions = append(conditions, req.Industry)
			} else {
				conditions = append(conditions, "industry = ?", req.Industry)
			}
		}
		stocks, err = dao.Stock.GetList(ctx, 1, req.Limit, conditions...)
		if err != nil {
			return nil, gerror.Wrap(err, "获取股票列表失败")
		}
	}

	// 生成模拟市场数据
	var marketData []*MarketData
	now := gtime.Now()
	for _, stock := range stocks {
		data := &MarketData{
			StockCode:   stock.Code,
			StockName:   stock.Name,
			Price:       10.0 + float64(len(stock.Code))*0.1,
			Volume:      int64(1000000 + len(stock.Code)*10000),
			Amount:      float64(10000000 + len(stock.Code)*100000),
			Change:      0.1,
			ChangeRatio: 1.0,
			OpenPrice:   9.9 + float64(len(stock.Code))*0.1,
			HighPrice:   10.5 + float64(len(stock.Code))*0.1,
			LowPrice:    9.5 + float64(len(stock.Code))*0.1,
			PreClose:    9.9 + float64(len(stock.Code))*0.1,
			Timestamp:   now,
		}
		marketData = append(marketData, data)
	}

	return marketData, nil
}

// QuerySignals 查询交易信号
func (s *DataQueryService) QuerySignals(ctx context.Context, req *SignalQueryReq) (*SignalQueryRes, error) {
	// 设置默认值
	if req.Page == 0 {
		req.Page = 1
	}
	if req.Limit == 0 {
		req.Limit = 20
	}

	// 构建查询条件
	var conditions []interface{}
	whereClause := ""

	if req.StrategyId > 0 {
		whereClause = "strategy_id = ?"
		conditions = append(conditions, req.StrategyId)
	}

	if req.StockCode != "" {
		condition := "stock_code = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.StockCode)
	}

	if req.SignalType != "" {
		condition := "signal_type = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.SignalType)
	}

	if req.Status != "" {
		condition := "status = ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.Status)
	}

	// 日期范围筛选
	if req.StartDate != "" {
		condition := "created_at >= ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.StartDate+" 00:00:00")
	}

	if req.EndDate != "" {
		condition := "created_at <= ?"
		if whereClause != "" {
			whereClause = fmt.Sprintf("%s AND %s", whereClause, condition)
		} else {
			whereClause = condition
		}
		conditions = append(conditions, req.EndDate+" 23:59:59")
	}

	// 添加条件到查询参数
	queryConditions := []interface{}{}
	if whereClause != "" {
		queryConditions = append(queryConditions, whereClause)
		queryConditions = append(queryConditions, conditions...)
	}

	// 获取信号列表
	signals, err := dao.TradingSignal.GetList(ctx, req.Page, req.Limit, queryConditions...)
	if err != nil {
		return nil, gerror.Wrap(err, "查询交易信号失败")
	}

	// 获取总数
	total, err := dao.TradingSignal.GetCount(ctx, queryConditions...)
	if err != nil {
		return nil, gerror.Wrap(err, "获取信号总数失败")
	}

	return &SignalQueryRes{
		List:  signals,
		Total: total,
		Page:  req.Page,
		Limit: req.Limit,
	}, nil
}

// GetStatistics 获取统计数据
func (s *DataQueryService) GetStatistics(ctx context.Context, req *StatisticsReq) (interface{}, error) {
	switch req.Type {
	case "overview":
		return s.getOverviewStats(ctx)
	case "pool":
		return s.getPoolStats(ctx, req)
	case "tag":
		return s.getTagStats(ctx, req)
	case "strategy":
		return s.getStrategyStats(ctx, req)
	case "signal":
		return s.getSignalStats(ctx, req)
	default:
		return nil, gerror.New("不支持的统计类型")
	}
}

// getOverviewStats 获取系统概览统计
func (s *DataQueryService) getOverviewStats(ctx context.Context) (*OverviewStats, error) {
	stats := &OverviewStats{}

	// 获取股票总数
	stockCount, err := dao.Stock.GetCount(ctx)
	if err != nil {
		g.Log().Warning(ctx, "获取股票总数失败", "error", err)
	} else {
		stats.StockCount = stockCount
	}

	// 获取股票池总数
	poolCount, err := dao.StockPool.GetCount(ctx)
	if err != nil {
		g.Log().Warning(ctx, "获取股票池总数失败", "error", err)
	} else {
		stats.PoolCount = poolCount
	}

	// 获取标签总数
	tagCount, err := dao.Tag.GetCount(ctx)
	if err != nil {
		g.Log().Warning(ctx, "获取标签总数失败", "error", err)
	} else {
		stats.TagCount = tagCount
	}

	// 获取策略总数
	strategyCount, err := dao.Strategy.GetCount(ctx)
	if err != nil {
		g.Log().Warning(ctx, "获取策略总数失败", "error", err)
	} else {
		stats.StrategyCount = strategyCount
	}

	// 获取激活策略数
	activeStrategies, err := dao.Strategy.GetCount(ctx, "is_active = ?", true)
	if err != nil {
		g.Log().Warning(ctx, "获取激活策略数失败", "error", err)
	} else {
		stats.ActiveStrategies = activeStrategies
	}

	// 获取运行中策略数
	runningStrategies, err := dao.Strategy.GetCount(ctx, "status = ?", "running")
	if err != nil {
		g.Log().Warning(ctx, "获取运行中策略数失败", "error", err)
	} else {
		stats.RunningStrategies = runningStrategies
	}

	// TODO: 获取信号相关统计
	// 这里需要实现信号数据表的查询
	stats.TotalSignals = 0
	stats.PendingSignals = 0
	stats.TodaySignals = 0

	// 系统运行时间（简化处理）
	stats.SystemUptime = "1d 2h 30m"

	return stats, nil
}

// getPoolStats 获取股票池统计
func (s *DataQueryService) getPoolStats(ctx context.Context, req *StatisticsReq) (interface{}, error) {
	// TODO: 实现股票池统计
	return g.Map{"message": "股票池统计功能待实现"}, nil
}

// getTagStats 获取标签统计
func (s *DataQueryService) getTagStats(ctx context.Context, req *StatisticsReq) (interface{}, error) {
	// TODO: 实现标签统计
	return g.Map{"message": "标签统计功能待实现"}, nil
}

// getStrategyStats 获取策略统计
func (s *DataQueryService) getStrategyStats(ctx context.Context, req *StatisticsReq) (interface{}, error) {
	// TODO: 实现策略统计
	return g.Map{"message": "策略统计功能待实现"}, nil
}

// getSignalStats 获取信号统计
func (s *DataQueryService) getSignalStats(ctx context.Context, req *StatisticsReq) (interface{}, error) {
	// TODO: 实现信号统计
	return g.Map{"message": "信号统计功能待实现"}, nil
}